Character identification systems with two position detection circuits



Aug. 30, 1966 J. B. CHRISTIE 3,

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. CHARACTER IDENTIFICATION SYSTEMS WITH TWO POSITION DETECTION CIRCUITS Filed Dec. 5, 1963 28 Sheets-Sheet 2 H 6 2 nesenmsm c SAMPLE (m4) I I3 1 SUMMING AMPLIFIER a PEAK DETECTOR SUMMING AMPLIFIER a PEAK DETECTOR LLI I- L'HLIUJ EE 23x 2 -4 32w 014k RIZ SUMMING AMPLIFER a PEAK DETECTOR J. B. CHRISTIE CHARACTER IDENTIFICATION SYSTEMS WITH TWO Aug. 30, 1966 POSITION DETECTION CIRCUITS 28 Sheets-Sheet 3 Filed Dec. 5, 1965 FI'G.3

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CHARACTER IDENTIFICATION SYSTEMS WITH TWO 1 POSITION DETECTION CIRCUITS Filed Dec. 5, 1963 28 Sheets-Sheet 6 #1 RESET (Flssaam 3 IS Aug. 30, 1966 A J. B. CHRISTIE CHARAGTERIDENTI POSITION DETECTION CIRCUITS FROM S.C.U.

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CHARACTER IDENTIFICATION SYSTEMS WITH TWO POSITION DETECTION CIRCUITS Filed Dec. 5, 1963 28 Sheets-Sheet 8 To "0" SUMMING AMPLaIFIER PEAK DETECTOR 25! "o" a "a" CHARACTER WAVE FORMS AS SEEN BY "0" RESISTOR MATRIX Aug. .30, 1966 J. B. CHRISTIE CHARACTER IDENTIFICATION SYSTEMS W ITH TWO POSITION DETECTION CIRCUITS Filed Dec. 5, 1963 28 Sheets-Sheet 9 ms1o) TO suns I) (B( H610) v I 4 TO 3|(FIGJ) 1 Z FIGJO) To suns.

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CHARACTER IDENTIFICATION SYSTEMS WITH TWO I POSITION DETECTION CIRCUITS 28 Sheets-Sheet 18 Filed Dec. 5, 1963 (FIG. 27)

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CHARACTER IDENTIFICATION SYSTEMS WITH TWO POSITION DETECTION CIRCUITS Filed Dec. 5, 1963 28 Sheets-Sheet 19- (F1026) K \P FIG. 27

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1. IN A SYSTEM FOR PROVIDING AN ELECTRICAL IDENTIFICATION OF RECORDED SYMBOLS, APPARATUS COMPRISING MEANS FOR GENERATING AN ELECTRICAL WAVE SHAPE CHARACTERISTIC OF A SYMBOL TO BE IDENTIFIED; A PLURALITY OF SUMMING NETWORKS , ONE FOR EACH DIFFERENT SYMBOL TO BE IDENTIFIED; A DELAY LINE FOR RECEIVING SAID WAVE SHAPE AND HAVING A PLUARLITY OF TAPS THEREALONG FOR DELIVERING A PLURALITY OF DISCRETE SIGNAL SAMPLES OF SAID WAVE SHAPE TO ALL OF SAID SUMMING NETWORKS; AND MEANS FOR DETECTING WHICH OF SAID SUMMING NETWORKS HAS THE GREATEST OUTPUT SIGNAL DURING A TIME SAID WAVE SHAPE OCCUPIES A REFERENCE POSITION IN SAID DELAY LINE DEFINED WHEN THE LEADING EDGE OF SAID WAVE SHAPE IS ADJACENT TO A SAMPLING REFERENCES TAP OF SAID DELAY LINE AND PROVIDING AN OUTPUT ELECTRICALLY IDENTIFYING SAID SYMBOL, SAID MEANS FOR DETECTING AND PROVIDING INCLUDING A PLURALITY OF MEANS FOR DETECTING AND STORING THE PEAK AMPLITUDE OF A VOLTAGE APPLIED THERETO, EACH OF WHICH IS COUPLED TO RECEIVE THE OUTPUT OF A DIFFERENT ONE OF SAID SUMMING NETWORKS, A PLURALITY OF GATE MEANS , A DIFFERENT ONE OF WHICH IS COUPLED TO A DIFFERENT ONE OF SAID MEANS FOR DETECTING AND STORING, MEANS RESPONSIVE TO THE LEADING EDGE OF SAID WAVE SHAPE FOR DEVELOPING A FIRST SIGNAL INDICATING THAT THE LEADING EDGE OF SAID WAVE SHAPE IS AT A POSITION IN SAID DELAY LINE AT A TIMING REFERENCE TAP PRIOR TO SAID SAMPLING REFERENCE TAP, MEANS RESPONSIVE TO BOTH THE LEADING EDGE OF SAID WAVE SHAPE AND SIGNAL SAMPLES OF SAID WAVE SHAPE DELIVERED THERETO FROM ALL TAPS OF SAID DELAY LINE PRIOR 